Add some investigation for the T470 / Thinkpad Classic 25

Now that there is a new thinkpad with a 7-row keyboard, it might be
possible to retrofit the Retro keyboard FRU into a T470 system.

Start adding the details required to download and examine these
EC firmware files.

Descriptions.txt

@@ -75,6 +75,8 @@ gruj26us.iso  sha1:89a3b3e364f37694bf514e01f9c3e2eda33a59e8 x1 Carbon (Type 20A7
 n10ur10w.iso  sha1:0e4c4ffb99146e50867dc1345ee2ef88c60ea192 x250 BIOS 1.21 (N10ET42W) EC 1.16 (N10HT17W)
 n14ur15w.iso  sha1:e106b024b1d448234e5ea958b0e8e93bbda1a543 x1 Carbon (Type 20BS, 20BT) BIOS 1.16 (N14ET38W) EC 1.09 (N14HT36W)
 n1mur06w.iso  sha1:e2bed755c065daf83cabc130b8d65c08e6a6a391 x1 Carbon (Type 20HQ, 20HR, 20K3, 20K4) BIOS 1.20 (N1MET35W) EC 1.14 (N1MHT25W)
+n1qur08w.iso  sha256:3bd8dd95a312707dbedd6385b3ae5a1ee2aab9eb69279542eaf1ef15c4fd5837 T470 BIOS 1.32 (N1QET57W), EC 1.14 (N1QHT32W)
+n1qur09w.iso  sha256:ad5fddecf44f4a2063fc5430ddfafadf7f1eb1d3f1549fbb4237c8a394d22829 T470, 25 BIOS 1.39 (N1QET64W), EC 1.25 (N1QHT43W)
 r02uj46d.iso  sha1:876a68add32d9c961cbdf80c74b88f92a66443cf x260 BIOS 1.19 (R02ET46W) EC 1.11 (R02HT29W)
 r0iuj09wd.iso sha1:21b3abf69b9ee7ecf12fe0880564312122b1ff75 x270 BIOS 1.16 (R0IET38W) EC 1.12 (R0IHT30W)
 
@@ -90,6 +92,7 @@ l430.G3HT40WW.s01D4000.FL1  rule:FL2,dep:g3uj25us.iso,param:01D4000.FL1
 t430.G1HT34WW.s01D2000.FL2  rule:FL2,dep:g1uj25us.iso,depi:g1uj25us.iso.bat,param:01D2000.FL2  t430 EC 1.12 Flash File
 t430.G1HT35WW.s01D2000.FL2  rule:FL2,dep:g1uj40us.iso,depi:g1uj40us.iso.bat,param:01D2000.FL2  t430 EC 1.13 Flash File
 t430s.G7HT39WW.s01D8000.FL2 rule:FL2,dep:g7uj21us.iso,depi:g7uj21us.iso.bat,param:01D8000.FL2  t430s EC 1.15 Flash File
+t470.N1QET57W.s0AN1Q00.FL2  rule:FL2,dep:n1qur08w.iso,depi:n1qur08w.iso.bat,param:0AN1Q00.FL2  t470 EC 1.32 Flash File
 t530.G4HT39WW.s01D5100.FL2  rule:FL2,dep:g4uj30us.iso,depi:g4uj30us.iso.bat,param:01D5100.FL2  t530 EC 1.13 Flash File
 w530.G4HT39WW.s01D5200.FL2  rule:FL2,dep:g5uj28us.iso,depi:g5uj28us.iso.bat,param:01D5200.FL2  w530 EC 1.13 Flash File
 x200.7XHT22WW.s01B9000.FL2  rule:FL2multi2,dep:6duj37uc.iso,depi:6duj37uc.iso.bat,param:01B9000.FL2;01B9100.FL2         x200 EC 1.04 Flash File
@@ -112,6 +115,7 @@ l430.G3HT40WW.img     rule:IMGnoenc,dep:l430.G3HT40WW.s01D4000.FL1  l430 EC 1.14
 t430.G1HT34WW.img     rule:IMG,dep:t430.G1HT34WW.s01D2000.FL2       t430 EC 1.12 (decrypted) (ARCompact cpu)
 t430.G1HT35WW.img     rule:IMG,dep:t430.G1HT35WW.s01D2000.FL2       t430 EC 1.13 (decrypted) (ARCompact cpu)
 t430s.G7HT39WW.img    rule:IMG,dep:t430s.G7HT39WW.s01D8000.FL2      t430s EC 1.15 (decrypted) (ARCompact cpu)
+t470.N1QET57W.img     rule:IMGnoenc,dep:t470.N1QET57W.s0AN1Q00.FL2  t470 EC 1.32 (may be wrong) (ARCompact cpu)
 t530.G4HT39WW.img     rule:IMG,dep:t530.G4HT39WW.s01D5100.FL2       t530 EC 1.13 (decrypted) (ARCompact cpu)
 w530.G4HT39WW.img     rule:IMG,dep:w530.G4HT39WW.s01D5200.FL2       w530 EC 1.13 (decrypted) (ARCompact cpu)
 x200.7XHT22WW.img     rule:IMGnoenc,dep:x200.7XHT22WW.s01B9000.FL2  x200 EC 1.04 (not encrypted) (H8300 cpu)